>>19187337'In development, the game filled up the entire cartridge despite only being half-finished. Satoru Iwata, now the president of Nintendo, singlehandedly did some very heavy compression to save the project from being released as an Obvious Beta. When he was done, there was enough space in the cartridge to include all of Kanto. To summarize, thanks to the current CEO of Nintendo, this game has twice as big a setting region-wise as every other Pokémon game released until the remakes.'
Citation : just copy into google to find out, some tropes site
